The finding of probable cause may be based upon hearsay in whole or in part, provided there is a substantial basis for believing the source of the hearsay to be credible and for believing that there is a factual basis for the information furnished. Before ruling on a request for a warrant, the issuing authority may require the complainant to appear personally and may examine under oath the complainant and any witnesses. The testimony shall be admissible at a hearing on a motion to suppress, if it was taken down by a court reporter or recording equipment.
The issuing authority shall issue a summons instead of a warrant upon the request of the prosecuting attorney, or when issuance of a summons appears reasonably calculated to ensure the defendant’s appearance.
Summons may be served upon a defendant who is an individual by delivering a copy to the defendant personally, or by leaving it at the defendant’s usual place of residence with some person of suitable age and discretion then residing therein, or, except when the summons is issued in lieu of executing a warrant by arrest, by mailing it to the defendant’s last known address by United States certified or express mail with a return receipt requested or by commercial carrier service utilizing any form of delivery requiring a signed receipt. When service of summons is made by United States certified mail or express mail, it shall be served by the clerk in the manner prescribed by Civ. R. 4.1(A)(1)(a). When service of summons is made by a commercial carrier service, it shall be served in the manner prescribed by Civ. R. 4.1(A)(1)(b). Summons issued under division (A)(2) of this rule in lieu of executing a warrant by arrest shall be served by personal or residence service. Summons issued under division (A)(3) of this rule in lieu of arrest and summons issued after arrest under division (F) of this rule shall be served by personal service only.
A summons to a defendant who is not an individual shall be served in the manner provided for service of that type of entity in Civ.R. 4 through 4.2 and 4.6(A) and (B), except that the waiver provisions of Civ.R. 4(D) shall not apply.
When the copy of the summons has been served by delivering a copy to the defendant personally or by leaving it at the defendant’s usual place of residence with some person of suitable age and discretion then residing therein, the person serving summons shall endorse that fact on the summons and return it to the clerk, who shall make the appropriate entry on the appearance docket. When the copy of the summons has been served by mailing it to the defendant’s last known address by United States certified or express mail or by a commercial carrier service utilizing any form of delivery requiring a signed receipt, it shall be docketed and returned in the manner prescribed by Civ.R. 4.1(A)(2).
When the person attempting to serve summons by delivering a copy to the defendant personally or by leaving it at the defendant’s usual place of residence with some person of suitable age and discretion then residing therein is unable to serve a copy of the summons within twenty-eight days of the date of issuance, the person serving summons shall endorse that fact and the reasons for the failure of service on the summons and return the summons and copies to the clerk, who shall make the appropriate entry on the appearance docket. If the return of service of a copy of the summons attempted to be served by United States certified or express mail or by a commercial carrier service utilizing any form of delivery requiring a signed receipt shows failure of delivery, the clerk shall file the return receipt or returned envelope in the records of the case.
At the request of the prosecuting attorney, made while the complaint is pending, a warrant returned unexecuted and not canceled, or a summons returned unserved, or a copy of either, may be delivered by the court to an authorized officer for execution or service.
Ohio. Crim. R. 4